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              1. PILCURE F
                • Overview
                • Compounding Information
                • Application
                Chemical Name Blend of MBTS & Basic Accelerators
                Chemical Structure Physical blend of accelerators MBTS, DPG & HMT
                Product Specification
                Parameter Limits Test Method
                Product form Powder (OT) -
                Color Cream -
                Melting point (Final) , °C (min) 140, (may vary since a blend) D 1519
                Heat Loss, % (max) 0.5 D 4571
                Ash, % (max) 0.75 D 4574
                Paraffinic Oil (<0.2% PCAH), % 1.0-2.0 NOCIL G-40
                Residue on 150 µm sieve, % (max) 0.10 D 4570
                Residue on 63 µm sieve, % (max) 0.50 D 4570
                Typical Data
                Specific gravity at 25°C 1.40 D 1817
                Bulk density, kg/m3 350 - 390 NOCIL G-44
                Bulk density (Comp), kg/m3 450 -490 NOCIL G-44
                Product Information
                Solubility Soluble in chloroform. Partly soluble in ethyl alcohol & solvent naphtha. Insoluble in benzene & petroleum ether.
                Classification Semi ultra fast accelerator.
                Discoloration & Staining Non-discoloring and Non-staining.
                FDA Approval Status Contains MBTS hence regulated for use in articles in contact with food under FDA 21 CFR 177.2600, 175.105 and BgVV XXI, Categories 1-4.
                Toxicity Data
                (Please refer to the latest
                 Toxicological information.)
                The basic accelerator components of the blend may be harmful if swallowed and can cause eye/skin irritation.
                Handling & Personal Protection Ensure good ventilation and avoid creating dusty atmosphere. In case of eye or skin contacts wash out with clean water for at least 15 minutes. Obtain medical advice urgently. If swallowed, seek immediate medical assistance
                Storage Store at room temperature in a cool, dry and well ventilated place. Avoid exposure of the packaged material / product to direct sunlight & heat.
                Packaging
                Paper-Fabric Bag 20 kg
                FIBC -
                Storage Life 12  months
                Color code Brown colored broken strip.
                Pilcure F is a semi-ultra fast accelerator blend for NR, SBR, BR, NBR and other highly unsaturated diene rubbers. It readily disperses in rubber compounds, and has been specially formulated to avoid grit formation on prolonged storage. Pilcure F has a long curing range and is very active above 115°C. Pilcure F gives fast curing characteristics for polyisoprene rubber (e.g. NR) based compounds. At equal dosages in NR, Pilcure F is less scorchy than MBT and exhibits almost similar or slightly faster cure rate and higher state of cure as compared to MBT or MBTS and hence the stress-strain properties of the vulcanizates are also superior. Thus, Pilcure F can be used as a single accelerator for rubber compounds where faster curing rates are desired.

                Normal dosages of Zinc oxide and Stearic acid are necessary as cure activators for Pilcure F. Pilcure F accelerator based cure systems can be further boosted using small proportions of TMTM / TMTD to improve the rate of cure with considerable compromise on scorch and reversion resistance particularly if dithiocarbamate accelerators are used as boosters. Pilcure F accelerator based systems can be retarded by using small proportions of Pilgard PVI or other acid retarders. Stearic acid also acts as an effective retarder and improves flow-properties of the rubber compounds during molding operations. Pilcure F is a better choice for the manufacture of white/colored products as compared to thiazole class accelerators alone.
                Pilcure F and its combinations with booster accelerators are widely used in NR, SBR, NR-SBR / BR blends, NBR based rubber compounds used for the manufacture of rubber products such as cycle tyres (black " colored), footwear products, hot air cured rubber products, cables, rubber rollers, ebonites etc.

                TYPICAL DOSAGES OF PILCURE F
                Product Rubber Accelerator /? Sulphur, phr
                F MBTS TMTD ZDBC S
                Cycle Tyre Treads Colored Cycle Tyres
                Casing
                NR-RR
                NR-SR
                NR-SR
                NR
                1.0-1.2
                1.2-1.5
                1.2-1.5
                1.2-1.5
                -
                -
                -
                -
                0.0-0.15
                0.15-0.25
                -
                0.1-0.2
                -
                -
                0.2-0.3
                -
                2.2-2.5
                2.0-2.2
                2.2
                2.75
                Footwear
                Microcellular Solings
                Soles & Heels
                Colored Footwear Parts
                Hot air cured footwear
                NR-SBR
                NR-SBR
                NR
                NR/SR
                1.2-1.5
                1.0-1.3
                1.0-1.2
                1.3-1.5
                -
                -
                -
                -
                0.0-0.10
                0.0-0.20
                -
                0.1-0.2
                -
                -
                0.2-0.4
                -
                2.2-2.5
                2.0-2.2
                1.8-2.0
                1.8-2.0
                Hot Air Cured Products NR/SBR 1.3-1.5 - - 0.2-0.4 2.2-2.4
                Cables NR 1.5 - - - 0.8-1.0
                Molded & Extruded Goods NR
                SBR
                NBR
                0.8
                1.0
                1.2
                0.4
                0.4
                0.3
                -
                0.0-0.2
                0.0-0.2
                -
                -
                -
                2.2-2.5
                2.0-2.2
                1.5
                Hard Rubber Products
                Rollers
                Ebonite products
                NR
                NR
                1.5
                2.0-3.5
                -
                -
                -
                -
                -
                -
                4.0-8.0
                30.0-35.0
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